Case Excavator Engine Crankshafts parts list
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580SE, 580K, 580SK, 580L, 580SL, 590T, 590SL, 580M, 580SM, 590SM, 570LXT, 570MXT, 584E, 585E, 586E, 585G, 586G, 588G, 450C, 550G, 550H, 650G, 650H, 650K, 750H, 750K, 1840, 1845C, 40XT, 60XT, 70XT, 75XT, 85XT, 90XT, 95XT, W11B, W14B, 660, 760, 686G |
Crankshaft (Cummins 4B & 4BT) |
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3907803 |
$590.00
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680K, 680L, 780C, 780D, 850D, 850E, 850G, 850H, 850K-I, 1150E, 1150G, 1150H, W14B, W14C, 621, 621B, 621C, 880D, 1088, 9030, 9030B |
Crankshaft (Cummins) |
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J918324 |
From
$874.00
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Replacement engine crankshafts for Case excavators running Cummins 4-390, 4T-390, 6590, and 6T590 engines, covering forged crankshaft assemblies for compact and mid-size excavator platforms.
Fits Models At A Glance
- Compact Excavators: 9030, 9030B
- Mid-Size Excavators: 1088
Key Notes
- Application: Rotating assembly that converts piston travel into crankshaft rotation.
- Engine Fit: Cummins 4-390, 4T-390, 6590, and 6T590 diesel engines.
- Condition: New and used crankshafts available depending on model.
- Journals: Machined main and rod journals ready for standard bearings.
Why Choose Broken Tractor
- ✅ Verified fitment before every crankshaft ships
- ✅ Fast shipping from two U.S. locations
- ✅ Knowledgeable team backing every Case order
Frequently Asked Questions
Which Case excavator models use the Cummins 6590 and 6T590 crankshaft?
Broken Tractor carries the crankshaft for Cummins 6590 and 6T590 engines (SKU J918324), which fits Case excavator models including the 1088, 9030, and 9030B. This is the rotating assembly that converts piston travel into crankshaft rotation. Confirm your engine model matches the 6590 or 6T590 before ordering.
What engines do Case excavator crankshafts fit?
We carry forged crankshafts for Cummins 4-390, 4T-390, 6590, and 6T590 diesel engines used in Case excavator platforms. The correct crankshaft depends on which of these engines is in your machine, so identify your engine model first. Matching by part number is the surest way to get the right rotating assembly.
Are Case excavator engine crankshafts new or used?
Both new and used crankshafts are available depending on the model. The journals are machined on both main and rod journals and ready for standard bearings. If you are unsure which condition fits your rebuild, our team can help confirm the right crankshaft for your engine.
How do I know which crankshaft fits my Case excavator?
Fitment is based on your Cummins engine model rather than the machine alone, so start by confirming whether you have a 4-390, 4T-390, 6590, or 6T590 engine. Broken Tractor verifies fitment before every crankshaft ships. If you need help matching the part number to your serial number, call our parts team at (800) 909-7060.
